Dear Professors and Experts,
I was doing an experiment to measure the recovery rate.
I want to spike 1 ppb after the dilution of soil in 10000 times, so I was spiking 1 mL of 10 ppm heavy metals (HM's).
Firstly, I took 0.5 gr soil in a vessel and then added 1 mL HM's then diluted with HNO3 Concentrate 10 mL and go to the digestion process. After that, I diluted it in 5 times, filtered, and finally diluted in 200 times.
Normally, without spiking, the formula to get mg/kg is
mg/kg = ppb x 10 x 1000/ gr x 1000
If I spiked it with 1 mL 10 ppm of HM's, does it change the formula?
Thank you very much
Kindly check Determination of heavy metals in soil by inductively coupled ... https://www.researchgate.net/publication/318611829_Determination_of_heavy_metals_in_soil_by_inductively_coupled_plasma_mass_spectrometry_ICP-MS_with_internal_standard_method
The most common method for determining the concentration of metals contaminants in soil is via total elemental analysis (USEPA Method 3050). The level of metal contamination determined by this method is expressed as mg metal kg−1 soil. https://www.hindawi.com/journals/isrn/2011/402647/
Also check https://www.tandfonline.com/doi/pdf/10.3184/095422910X12702277277554
Spike method will be increasing the found concentrations also. As a simple for determination of recovery, you can calculate by comparing the measured concentration to real spike concentration added
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